Jul 21 – 25, 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

M1Or2A-04: Effect of Grain Size, Flux Pinning, and High Critical Field in Ternary APC Nb3Sn Wires

Jul 22, 2019, 11:45 AM
Level 6, Room 12-13

Level 6, Room 12-13

Contributed Oral Presentation M1Or2A - A15 Conductors


Jacob Rochester (The Ohio State University)


Nb3Sn conductors have been made which incorporate ZrO2 artificial pinning centers (APCs) that serve to refine the grain size of the superconducting material. Work on these wires has resulted in conductors which approach the FCC specification of Jc of 1500 A/mm2 at 16 T and 4.2 K. Understanding the causes of high Jc at mid to high magnetic fields in these wires is crucial for developing an optimum conductor for next-generation particle accelerators. Reduced grain size has been demonstrated to increase Jc, due to the increased flux pinning at grain boundaries. In addition, ZrO2 particles serve as point-like flux pinning centers, with a different behavior versus magnetic field. The relative contribution of these two factors on the Jc is evaluated. The effect of stoichiometry on the increased Birr and Bc2 in ternary APC wires is also considered.

Primary authors

Jacob Rochester (The Ohio State University) Xingchen Xu (Fermi National Accelerator Lab) Xuan Peng (Hyper Tech Research Inc.) Mr Michael Tomsic (Hyper Tech Research) Mike Sumption (The Ohio State University)

Presentation materials